Sliding-door lock.



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. accompanying GEORGE M. BLAIR, OF ST. LOUIS, MISSOURI.

SLIDING-DOOR LOCK.

Specification of Letters Patent. Application filed March 31, 190s.

Patented Dec. 1, 1908. Serial N o. 424,450.

To all whom fit may concern:

Be it known that I, GEORGE M. BLAIR, a citizen of the United States, andresident of St. Louis, Missouri, have invented certain new and usefulImprovements in Sliding- Door Locks, of which the following is aspecification, containing a full, clear, and exact description,reference being had to the drawings, forming a part hereof.

My invention relates to a sliding door lock, my object being' toconstruct a simple, inex pensive lock which is particularly applicablefor sliding doors, and which is so located as that the locking boltscarried thereby will at all times enter their respective seats or reofthe warping or settling of the doors on which the locks are carried, orthe door casings in which the lock and bolt engage.

Heretofore it has generally been the practice to locate locks onthemeeting stiles of sliding doors, and where either one of the doorswarp or settle to even a slight degree, said locks are renderedinoperative owing to the fact that the locking bolt is out of alineAment with the corresponding opening, and by my improved constructionthis difiiculty and annoyance is overcome.

My invention consists of a lock housing located in one of the doorStiles, preferably there being a pair of lock ing bolts pivotallymounted in one end of the lock housing, which locking bolts are arrangedto swing in a vertical plane when moved into or out of a lockedposition.

My invention further consists in certain novel features of constructionand arrangement of parts which will be hereinafter more fully set forth,pointed out in the claims, and illustrated in the accompanying drawings,in which:

Figure 1 is an elevation of one of a pair of sliding doors equipped witha lock of my improved construction; Fig. 2 is a vertical section takenthrough the lock housing, the same being in position in the door stile;Fig. 3 is a horizontal section taken approximately on the line 3-3 ofFig. 2, and with the locking bolts shown in locked positions; Fig. 4f isa vertical section taken on the line 4.-4 of Fig. 3, and with thelocking bolts in an unlocked position; Fig. 5 is an elevation of amodified form of my improved lock, and which modified form is applicablefor use on showcases,

i gage in the notch cabinets, and the like; and Fig. 6 is a verticalsection taken approximately on the line 6&6 of Fig. 5.

Referring bv numerals to the accompanying drawings: 1 designates thesliding doors, which are of the usual construction, and arranged foroperation in the usual manner in the door frame 2.

Seated in the outer or rear stile of each door is a lock housing 3, andarranged to swing vertically therein .is a plate 4, fulcrumed upon a pinl5, and the rear end of said plate is constructed to be engaged by a keywhich enters the housing 3 through a key hole 6.

Formed integral with the forward end of the plate l is a head or lug 7,of greater thickness than the body of the plate 4, and formed in theface of said head or lug is a horizontally disposed notch 8. Fixed tothe front end of the lock housing 3 is a bolt housing 9, which projectssilghtly beyond the edge' of the sliding door, and positioned withinthis lock housing is a pair of vertically swinging locking bolts 10,which are pivotally mounted on pins 11 seated in t-he front wall of thelock housing 3, and said locking bolts are of such length as that whenthey are swung outward and downward into locked positions their outerportions project beyond the side faces of the sliding door.

`Formed through thefront plate of the lock housing 3 is an opening 12,and fixed in the lower portions of the locking bolts and projectingthrough this opening' 12 is a pair of pins 13, the outer' ends of whichen- 8, formed in the head 7.

Formed in the faces of the posts or studding, or of the sliding doorpocket immediately adjacent the locks when the doors are closed, arevertically disposed grooves or notches 14, and fixed therein, againstthe rear faces thereof, are metal plates 15, which are for the purposeof preventing the outer ends of the locking bolts from cutting into thewoodwork when said bolts are swung into locked positions.

Vhen the doors are unlocked, the locking bolts 10 occupy verticalpositions in the bolt housing 9, as shown 1n Fig. 2, and when sopositioned the doors are free to be opened and closed as desired. lVhenthe doors are closed and it is desired to lock the same, the key isinserted through the key hole 6, and when said key is turned the rearend of the plate 4 is engaged, and said plate is swung upon the pin 5,and as a result the head 7 of the forward end of the plate is elevated.

The outer ends of the pins 13, occupying and bearing in the notch 8 inthe head 7, are moved upward through the opening 12, thus swinging thelocking bolts 1() upon the pins 11, which movement swings the main bodyportions of said locking bolts outward and downward into a horizontalplane, and when so moved the outer ends of the locking bolts occupy thenotches or recesses 14, thus effectually locking the doors. (See Fig.3.) The slots or recesses 14 are made of considerable length, in orderthat the doors can .be locked regardless of any settling or warping or'either the doors or the sliding door pocket.

In the modification shown in Figs. 5 and 6, a single locking bolt 16 ispivotally arranged in the lock housing, and formed in the under side ofsaid locking bolt is a notch 17, which is adapted to engage a plate orthe like, and prevent the parts on which this form of lock is positionedfrom being pried apart. This form of lock is particularly intended :toruse on the sliding doors of show cases, cabinets, and the like.

A sliding door lock of my improved construction is very simple,comprises a minimum number of parts, is easily operated, and the lockingbolts moving in a vertical plane at right angles to the vertical planeoccupied by the sliding door and lock housing, very effectually locksthe doors against any rearward or opening movement.

I claim:

1. The combination with a sliding door and sliding door pocket, ot' alock arranged in the rear stile of the sliding door, a pair of lockingbolts arranged to swing outward and downward in a vertical plane at oneend ot the lock housing, and means within the lock housing for moving`the locking bolts from one position to another.

2. The -combination with a sliding door and sliding door pocket, of alock arranged in the rear stile of the sliding door, a pair ing ahousing,

of locking bolts arranged to swing outward and downward in a verticalplane at one end of the lock housing, means within the lock housing formoving the locking bolts from one position to another, and there beingrecesses formed in the walls of the sliding door pocket which receivethe outer ends of the locking bolts when the door is locked.

3. A lock for sliding doors, comprising a housing, a pair of lockingbolts pivotally arranged at one end of the housing and arranged to movein a vertical plane at right angles to the vertical plane occupied bythe lock housing, and means within the housing for actuating the lockingbolts.

4. A lock for sliding doors comprising a lock housing, a bolt housing atone end thereof, a pair of locking bolts arranged within the bolthousing and ada-pted to swing in a vertical plane, and key-operatedmeans within the lock housing for shifting the locking bolts from oneposition to another.

A lock of the class described, comprisa locking bolt pivotally arrangedin the housing so as to swing in a vertical plane at right angles to theplane occupied by the housing, and key operated means within the housingvfor shifting the locking bolt from one position to another.

6. The combination with a sliding door of a lock housing arranged in therear stile of the door, a locking bolt pivotally held at one end of thelock housing so as to swing in a vertical plane at right angles to thevertical plane occupied by the sliding door, and key operated meanswithin the lock housing for shifting the locking bolt from one positionto another.

In testimony whereof, I have signed my name to this specification, inpresence of two subscribing witnesses.

GEORGE M. BLAIR.

Ttiitnesses M. P. SMITH, E. L. IVALLACE.

